Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7e37b79e946819f…

MALICIOUS

PDF

40.6 KB Created: 2020-08-30 19:18:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3aad41009b1fc190d98179eb7b4186fa SHA-1: 2a5b7f4860df8adf8e04ada0d478522cdaa97b34 SHA-256: e7e37b79e946819f1c0e9b0f5cca0b3474bf241c2afc993821aa58d6affb231f
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a link disguised as a forum post for "Rocksmith dlc forum" which redirects to a malicious URL. The file also contains a large number of embedded links, many pointing to static.usrfiles.com, which is identified as a link farm. The primary malicious URL is ttraff.cc, which is flagged as a malicious redirector. No scripts were extracted, and the document body was heavily obfuscated, but the presence of the malicious redirector and link farm strongly suggests a phishing or redirection attack.

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/wix?keyword=rocksmith+dlc+forum
    • https://static.usrfiles.com/ugd/b8c837_16b52d1e7e444b0396e282047c1fca6e.pdf
    • https://static.usrfiles.com/ugd/b8c837_9fc0f95631f744759b2ac730f477f9fc.pdf
    • https://static.usrfiles.com/ugd/cbdbb6_a7f3f3ff6d374fc1af64baee7048fdc4.pdf
    • https://static.usrfiles.com/ugd/590778_b95ce70809424e5092a54793f9156c9d.pdf
    • https://static.usrfiles.com/ugd/b8c837_45bbcf50317944e9922dec9d260c78bc.pdf
    • https://static.usrfiles.com/ugd/b8c837_3f6e0a5b89b14037a7c44b6d91043543.pdf
    • https://static.usrfiles.com/ugd/565485_3522c4d6b90c473da3ece3989cc3b111.pdf
    • https://static.usrfiles.com/ugd/b8c837_61bd09aa55164e8187b767f01e3b8b5b.pdf
    • https://cdn.shopify.com/s/files/1/0434/8185/8214/files/examen_psicometrico_laboral_con_respuestas.pdf
    • https://cdn.shopify.com/s/files/1/0440/7679/4008/files/labanu.pdf
    • https://cdn.shopify.com/s/files/1/0428/0002/1667/files/tamobaxo.pdf
    • https://cdn.shopify.com/s/files/1/0447/8740/0864/files/length_and_width_of_single_bed_sheet.pdf
    • https://static.usrfiles.com/ugd/b8c837_0992f025c53541fca04e5c472a853b50.pdf
    • https://static.usrfiles.com/ugd/b65acf_b0df0588fc7c4d6882c5d978afc56f83.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006019.bin
94aef15db6fc467df9db9909ef3d58f2af609b9452ab27565520427e7d50c7e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6019 5120 bytes
font_01_sfnt_off0000715c.bin
cf1a591e4633c84f063120ba7e5b8606921370438896d0263fba9adcf4e872fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x715C 10968 bytes

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